Jin Bo, Liu Shuhong, Du Yong, Kaptay George, Fu Taibai
National Key Laboratory of Science and Technology for National Defence on High-strength Structural Materials, Central South University, Changsha, Hunan, 410083, China.
Department Nanotechnology, University of Miskolc, Egyetemvaros, Miskolc 3515, Hungary.
Phys Chem Chem Phys. 2022 Sep 21;24(36):22278-22288. doi: 10.1039/d2cp01931k.
The surface melting of macro-crystals and melting of nano-crystals for Al, Cu and Ag pure components are modeled in comparison with literature data. The relevant temperatures of surface premelting and melting are calculated. The corresponding temperature-dependent equilibrium thickness of the liquid melted layer is obtained as well, which tends to infinity when the temperature is at the bulk melting point. Furthermore, the size-dependent melting behaviors for Al, Cu and Ag are investigated and the corresponding critical size is determined using a home-made code. The melting point depression with particle size is also demonstrated in the present work. As illustrated in the size-dependent phase diagram, the temperatures of both the solidus and liquidus decrease and they merge with the decrease in the radius.
对铝、铜和银纯组分的宏观晶体表面熔化和纳米晶体熔化进行了建模，并与文献数据进行了比较。计算了表面预熔化和熔化的相关温度。还获得了相应的随温度变化的液态熔化层平衡厚度，当温度处于体熔点时，该厚度趋于无穷大。此外，研究了铝、铜和银的尺寸依赖性熔化行为，并使用自编程序确定了相应的临界尺寸。本工作还证明了熔点随颗粒尺寸的降低。如尺寸依赖性相图所示，固相线和液相线的温度均降低，且它们随着半径的减小而合并。
